Cam operated pliers



Sept. 20, 1 o. v. MALMQUIST CAM OPERATED PLIERS Filed Nov. 25, 1946Patented Sept. 20, 1949 ="2,4s2,193 GAMmBERAmmBmERs bsesri fiviamrquisz,Mrmmpflrsffifim. m lrmmnmvember zsxi m'siseml No. 2125113 romm. (o1.Kl-78) theoth-er withegmat force. 7

it is a, fiurther object of the invention "to provide ;plier.scomprising a member having -a fixed ijalw at'oneend, a shankextendingfrom saidja'w and a hand-1e connected to =said shank, a member movablelong-itudln ally of nd .jaw rigidly secured to said second member :andadapted 4:0 cooperate with said -fixedejaiw in inember-lorigitudinallyof Theseand other objects andflzdvantagwof the mven'tion will be fullyset iorth the followfng ealdehank, a eec- 2 :1 s, view in side elevationof said iiiliers, as'omeqaa'rtpbeing broken away, others ashow'nlnvertical section and some wants being shown 4n -di1Iere1-1tv:posit1ons-in dotted lines;

345 a wiew in end velem/lion asseen'irom -the-- ri"ght-of-Fig.* r

Fig. 4 an end elevation as seen from "the le'ft of- FigHl-pand :5 -is averliical -section takeh on line 4 4 er Fig. 1,-as-indlcated by4ghearrows.

Referring to 4he drawings, -a. pair of $11615 iis -shown comprising amember 10 havipg fixed Jaw *Hla 'formed at :one end thereot While JawBay could be variously formed, -it is shown asextending at an angleto-member lo g nd-hevixg a ff aqe eprovided witgh mi i ugatione mp. Meizber has a shank lilc extending therefrbm and a handle 4001 -is securedto-seid ashank. While said 0 -handle ould tak yarious forms -and be yai'iously .positesides o'f :eafid shank by screws -or rivets H. A member=L2, shown as in the for n df geyoke, is: disposed on and embraces shankmc. i I 13 may eonvez iiently be formed a a, plate bent into substa,ntial Illshape and -thus having paral- -lel side .poriiiorgs arid theseare disposed 'at oppositeeides of 1121311; mentftheI eWith while thebight', portion of-mem- "me at eeid u side has :formed thereir -a-se11i-es -o' f recesses or depressions ldeepd-a n embe'r 4-3 preferablyin the form of a -eyli d-ltlcallfpin egclsends hetweeotheber J 2 z mdEgada-rited to seat "in one of the recesses l fle. -Me'mberjdqs securedin member :12 end while fi'liis poqld -be done various Ways, in

shown ai ghazving its ends riveted i-n the sides :of member l2. A springI4 formed pf errowaplates extends longitudinally-prelim lac,shesame-being largely disposed within member l2 and engaging the pportion iihereof, said epring -'havingends'bent over pheap in l-i SpringMextends has one side engaging {he side of shank 40c having-thedepreseione lfle bent slightlyupward. 13e- Jow sha,rrk 400 member [2 hasrigidly secured -bhereto a asecond ijalw 5. While flaw i=5 -could *be*seoured-in verious ways, it is illustrated as eeou'red 450 member H 'byspaced rivet-s l 6. Jaw I 5 is arranged to oppose and cooper-ate with:jaz-w 10a and a face -|5a ipPOVidBd with -cemer edions and adapted 45ocooperate with the face HI!) -A-hand1e =l-8 is "spivoted adjaof member Mon {he embodim nt r 'fihe invention illustra'tegl -i-t is igripping ajnobjeot. 'ee'nt =the rear end V longitudinally 1 structure of pliers, 7loan be firmly grasped and great pressure exerted upon the jaws of thedeparting from capable of carrying out the objects "-tion, a memberhaving a fixed jaw at said jaw having a gripping face, a -ing from saidjaw and having a other end'of said member, said-jaw extending forwardlyand said face being disposed at an obsaid shank I opposite that havingthe recesses llle therein.

end or the with handle Handle l8 extends toward the rear pliers and isadapted to be grasped Hid in the operation of the pliers. disposed inshank I00 adjacent handle [0d and projects at either side of said shankto form a stop limiting the movement of member [2.

With the described construction, member can be frictionally movedlongitudinally of shank lllc with jaw 65 and handle l8 as spring l4holds pin i3 lightly in engagement with shank 10c and in one of therecesses Hie. as a rod 22 is to be grasped, face 16b will be placedthereagainst and member 12 will then be moved of shank We to bring face15a, into engagement with rod 22. The handle I8 is now swung towardhandle Mid and said handles grasped in one hand of the operator. Member12 is oscillatable on pin 13 and the cam portion 13a" now moves on shank10c and acts to swing member 12 about pin i3, thus swinging jaw l5toward jaw 18a. Great leverage is brought to bear in this movement sothatjaw [5 can be moved with great pressure against object 22 sothat'the latter will be very'tightly gripped and prevented from anymotion in said jaws. At the same time cam portion use causes the bightportion of member ii to move toward the shank lilo and this causes pinit to bind in one of the re cesses We so that longitudinally of shank weis prevented. By moving the handles toward each other therefore memberI2 is held from longitudinal movement of shank tile and jaw I5 is swungwith great force toward jaw engaged.

From the above description it will be seen that I have provided a sim 1eand yet highly efficient by means oi which an object 7 pliers to graspsaid object so that it'cannot move or turn in said jaws. The parts ofthe device are comparatively few and of simple construction and thedevice can be easily assembled. The device has been amply demonstratedin actual practice and foundto be very successful and efilcient.

It will of course be understood changes may be made in theform,'details, ar rangement and proportions of the parts, without thescope of applicants invenin a device above set forth, in the parts andcombinations of parts disclosed and defined in the appended claims.

' Whatis claimed is:

1. A cam operated pliers having in tion, which generally stated,consists combinaone end, shank extendhandle at the tuse angle to saidshank, a slidable carriage on said shank comprising a U-shaped platesubstantially rectangular in side elevation and having its bight portiondisposed over the top of said'shank and its sides extending in closeproximity to and substantially parallel to the sides of said shank,

having a plurality of recesses extending transversely thereof in its topside, a pin secured in and extending between the sides of said carriageabove said shank and adapted to seat in any movement of member I2 Hla'to grip the object to be Apin is When an'object suchrocked about shaftextending from 4O jaw and having that various said first mentioned jawand said 7 the top of said shank at to the sides of cent the bightadjacent the end jaw faces, and a 1,709,378 Sulger 2,409,627

any one of said recesses, a second jaw rigidly secured to saidcarriageadjacent the end thereof which is adjacent said first mentioned jaw,said second jaw extending forwardly and having a face making a slightlahgle wth 'saidfirst mentioned face, a second handle pivoted to saidcarriage below said shank and adjacent the end of said carriage remotefrom said jaws, said handle having a cam formed thereon adjacent saidpivot and engageable with the bottom side of said shank, and resilientmeans disposed in the bight portion of said carriage engaging said pin,Said carriage and said shank to hold said shank or carriage in its upperposition and said cam in engagement with said shank whereby when saidhandles are moved together said carriage is the axis of said pin to moveits lower side'toward said first mentioned jaw and grip an articlebetween said faces and hold said carriage in'a stationary position. v

having in combinaat one end, a said. jaw and having a handle at theother end of said'member, said jaw extending forwardly and'h'avingfaface'disposed at an angle substantially greater than degrees relative tosaid shan a slidable' carriage on said shank formed'by' a U -shapedplate rectangular'in side elevation and of considerable length andhaving its bight portionextending over the top of said shank with itssidessubstantially parallel 2. A cam operated pliers tion, a member topside, a pin secured in and extending transversely betweenthe sides ofsaid carriage adjaportion thereof and being adapted to seat in anyone ofsaid recesses, a second jaw fixedly secured'to said carriage adjacentits lower end and the end adjacent said first mentioned a face making aslight angle to said first mentioned face, a second handlepivoted tosaid carriage adjacent the bottom thereof and thereof remote fromsai'd'first mentioned jaw; said second handle having a cam adjacent itspivot engageable with the bottom sideof said shank whereby when saidhandles are moved together said carriage is rocked about the axis ofsaid pin to swing saidsecond jaw toward carriage is held stationary withthe work clamped between said plate spring disposed between the topsideof said shank and said bight in said carriag'e'and having one endextending over said pm, said spring engaging the top of saidbightintermediate the ends of said spring and engaging its other end. 7"OSCAR V. MALMQUIST.

REFERENCES CITED j The following references are of record in the file ofthis patent:

, UNITED STATES? PATENTS Number V V 7 Name Date 627,401 Edwards June 29,1399 Q 656,622 Barnes Aug. 28, 1900 747,261 I Sterne I 1,147,340Petterson 1,269,275 Grogan Dec. 15, 1903 July- 20; 1915 June 11, 1918Apr. 16, 1929 'Helgeson Oct. 22, 1946 V said-shank, said shank having aplurality of transversely extending recesses in its

